Adjustable wrench.



A. D. CHAPMAN. ADJUSTABLE WRENCH. APPLICATION FILED JULY I9. 1915.

Patented Nov. 30, 1915 'trataran srariis rasierer carries.

ARTHUR D. CHAPMAN, OF CELINA, DHO.

ADJUSTABLE WRENCH.

maaien.

Specification, of Letters Patent.

application ined .iuly 19, 1915. serial No. 40,765.

-To all whom t may concern Be it known that l, ARTHUR D. CHAPMAN, a citizen of the United Sti'itegresiding at Celina, in the county of Mercer and State of Ohio, have invented certain new and useful Improvements in Adjustable Wrenches; and I do declare the following to be a full, clear,

and eXact description of the invention, such iwhich the device is to be applied by swingdirection.

ing the handle, in the direction in which this article is to be turned, and for opening the jaws by swinging the. handle in the reverse Another object of this device is to provide means whereby by swinging the operating handle a predetermined distance, the same V may be disengaged from the movable jaw, and the ja'w may be adjusted with respect to said operating 'handle to secure various widths of adjustments.

Afurther object of the inventionl is to provide a device of this character which' is simple and durable in construction, inexpensive' to manufacture, and one which will be very eliicient in operation.

With these and numerous other objects in View, my invention consists of the certain novel features of construction, combination land arrangement of parts which will be herein referred*y to vand more particularly pointed ont in the specifica-tion and claim.

In the accompanying drawings; Figure 1 is a front elevation of my improved device; Fig. 2 is a side elevation; ,and Fig. 3 is a central vertical. section showing thej aws distended.

I -n describing my invention l shall refer, ""to the drawings in which similar reference .characters designate corresponding parts vthroughout.the'several views and in which the numeral 1 designates a handle of the ordinary plier type which has extending from' one ende pair of oppositelyjspaced` side plates which are triangplar inshape and are designated by the numerals 2 and 3. These side plates 2 and 3 have projecting from one end of the extremities thereof an integral stationary jaw e which is of the usual type, having a work engaging face 5 as clearly shown in the drawings.

The side plates 2 and 3 of the handle 1 have at their outer extremities laterally in wardly projecting ribs. 6 and T which extendtransversely'across the saine for a purpose to .be hereinafter more fully described. These side plates are held in spaced relation with each other by spacing lugs or supports 8 and 9 which are formed integrally with said side plates and are positioned a short distance below the ends of the extremities thereof.

lThis adjustable wrench ahd plier is provided with a movable jaw' 10 which is substantially similar in structure to the stationary jaw Il and has a coacting work engaging face 11 formed thereon. The lower portion of the movable jaw 4 which is designated by the numeral 12 projects laterally therefrom as shown at 13 and has formed on the lower edge of the said lower portion a series of ratchet teeth 14:. These ratchet teeth 14 are sloped slightly at one side as clearly. shown in Fig. 3 of the drawings so that they may securely and firmly coact with the part of this device that is adapted for engagement therewith.

Upon. opposite sides of the movable'jaw 10 are formed transversely extending notches 15 and 16 which are adapted for sliding engagement-with the ribs 6 and 7 on the Patented Nov. 39, 1915.

extremities of the side plates when this movable jaw is inposition, whereby the said jaw 1s adapted to slide transversely between the side plates 2 and 3, and will be held securely therebetween by reason of the coaction with the notches, and ribs formedon said jaw and plates. This movable jaw is operated by means of an operating lever 17 which is of the usual plier type and corresponds in general outline of construction tothe handle 1. This lever 17 is fulcrumed adjacent its upper end between the side plates 2 and 3 of the handle 1 as shown at 18. The outer extremity of the said lever has formed thereon a plurality of teeth 19 which are adapted for engagement with the teeth 14 on the lower portion of the movable jaw l0. This operating lever 17 is so positioned and fulcru'med with respect to the handle 1 between the said plates 2 and handle 1.

respect to the stationary jaw 4. This operating lever 17 may also be thrown out of engagement with the teeth 14 when moved to the position shown in Fig. 3 of the drawings.

On the inner side of the handle 1 of this ldevice is formed a'lug 20 which is adapted tol securely hold one end of a. coil spring 21 which is positioned between the said handle and the operating lever. The other end of the coil spring 21 is firmly 'held in a lug 22 projectingfroin a spring 23 which is securely riveted as shown at 21 to the inner face of the operating lever 17. By this spring actuating means it will be obvious that upon swinging the operating lever 17 outward, a constant tension will be mailitained thereon to return the same to its normal position, a short distance from the A This normally spaced distance between the handle and the operating lever, is maintained by the end of the spring 23 engaging the handle 1 as shown by the numeral 25 in Fig. 1 of the drawings.

In the operation of this device, it is neces-v sary wheny the parts are assembled as shown in Fig. 1 of the drawings merely Vto move the operating lever 17 with respect to the handle 1 whereby on account of the coac'- tion between the end of said operating lever and the movable jaw of this device, the said movable jaw will be moved transversely across the top of the end `plates of the handle 1, toward the stationary jaw on said end plates. This inward movement will be against the tension of the spring 23 on the operating lever 17, and upon release of the handle and said lever, the same will return to its normal position. It is obvious that the work engaging faces 5 and 11 of the jaws of this device would be easily engaged with 'different sized nuts, etc., to which this device is applicable for use.

' Another important feature of this invention is that the operating lever 17 may be swung outwardly from the handle 1 to the position as shown in Fig. 3 of the drawings, whereby the teeth 19 on the end of the same will be withdrawn from engagement with the teeth on the movable jaw, whereby said jaw may be slidably adjusted between the extremities of the end plates 2 and 3,.so

that when the teeth onthe end o f the operating lever again coact therewith, an entirely different adjustment may be obtained, to widen or decrease the adjustability of the movable jaw with respect to the stationary one. Vhen the operating lever 17 is in position todisengage its coacting end from the movable jaw, the coil spring 21 between the handle and said lever will be expanded and will exert a constant tension upon the said lever to return the same to its normal position.

From the foregoing description of the construction of my improved device, the man ner of applying the same to use and the operation thereof will be readily understood, and it will be seen that I have provided a simple, inexpensive and elicient means for carrying out the objects of the invention.

I claim as my invention:

An adjustable jaw wrench comprising a handle having a pair of triangular-shaped plates, teeth on the edge of the lower por-` tion of said jaw, an operating `lever fulcruined adjacent one end between the side plates, a flat metal spring secured at one end on said lever and having its free end bearing against the handle, a coiled spring connected at one end to said flat spring and at the other to the saidhandle, and teeth on said fulcruined end of the lever adapted for coaction with the teeth on the lower portion of the jaw tomove said jaw upon operation of thelever.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

` ARTHUR D. CHAPMAN.

Witnesses:

CLARENCE D. RICE. Bisssin M. COPELA'ND. 

